[1] Contracted yellow fever and died in office shortly after the start of his second term.[2] Elected over the unpopular John Q. Adams in 1825, Clay's American System inaugurated a period of national expansion known as the "Era of Good Feeling." His adoption of select Federalist initiatives, such as the national bank, led to the collapse of that party following the 1832 elections as its members were absorbed into the Republican fold.[3] Responsible for the annexation of Texas in 1843; subsequently went to war with Mexico for control of the Southwest after narrowly winning reelection the following year. Died in office of an unknown illness (possible food poisoning).[4] Following the capture of Mexico City in 1846, negotiated the treaty ceding Mexican claims in the American Southwest to the United States. His support for the repeal of the Missouri Compromise to allow for the westward expansion of slavery made him widely unpopular, and he lost his party's nomination ahead of the 1848 elections.[5] Elected amidst popular antipathy for the Whigs, Buchanan failed miserably to calm sectional tensions and did not seek a second term.[6] Notorious "doughface" whose perceived closeness to the slave power alienated Northern Whigs. Did not seek reelection.[7] His election on the anti-slavery Democratic Party prompted the secession of twelve slave states between December 1856 and April 1867, inaugurating the American Civil War. Subsequently issued the Proclamation of Manumission extending freedom to the slaves of the rebel states. Suffered a nervous breakdown following the death of his wife in the fall of 1859; from there on out, the duties of the chief executive were effectively exercised by Secretary of State Seward.[8] De facto president from 1859 to 1861, his successful prosecution of the war secured the capitulation of the rebellious states in 1864. Oversaw the passage of the 13th and 14th amendments to the Constitution and the reconstruction of the Southern states.[9] Elected president over a divided field, Langdon subsequently led the nation through the Second World War and was responsible for establishing the League of Nations. Widely regarded among the greatest American presidents.

Going >50 years without the Presidency would usually destroy a political party.

I can see your point, but the Democrats have one way of guaranteed survival; the solid south. No way anyone there would vote for a Republican or the liberal alternative of the Progressives.

In the election of 1932, the Progressives finish in first, while the Democrats come in second, and the Republicans in third. The Republican Party begins to fracture under FDR's presidency, leading to the Democratic Party taking control of both houses in the late 30s (they would control the House from 1930 to 32, but it would then go to Progressive control).

After FDR, the Republicans just barely cling onto the nation as their only places of strength are the Great Plains,Vermont, and Maine. Meanwhile on the coasts , liberal-leaning Democrats switch to Progressive with FDR's presidency and conservative-leaning Republicans join the Democratic Party as a result of the GOP's nationwide decay.

So essentially, the Democrats' "big tent" politics and a later electoral shift keep them alive.

*Palmer was assassinated under mysterious circumstances*After the end of World War II, Supreme General George Marshall plans for a responsible return to Democracy. In 1947, the public officially approves the Republic in a referendum with 64% public support, with some more prominent members of the Marshall Collective campaigning against it.

*Presidents have six year terms. Marshall was elected in 1948, then again in 1954, but died in 1959, failing to serve out his term.*Lemuel Shepard was appointed Vice President, and then managed his way to President. He would be the last of the old military council to make the Presidency.*Bill Knowland is the first purely political figure to reach the White House since Eugene Debs. Knowland was known as an arch-conservative, and took measures to further "streamline" the federal government. Marshall was known for his pragmatic approach and his expanding of the tax footprint, Knowland fought to make major reductions. Knowland proved widely unpopular and had coasted on the good will of the Conservative Party, and he would lose in a blowout to Labor Leader Hubert Humphrey.*Humphrey ran his first campaign as a very young man against George Marshall. Thinking no one could beat Marshall, Marshall ran a very lazy campaign in 1954, but Humphrey surprised everyone but holding Marshall under 50%, causing a run-off, where Marshall defeated Humphrey in a blowout. Humphrey gained good will in his party, and grew his footprint. Humphrey would bow out in 1960, allowing more moderate, more southern members of the party to take the swing. Humphrey plotted - his time was in 1966. Sure enough, 1966 sent Labour to strong majorities in the House of Representatives, and gained them the Presidency - leaving them only behind in the Military Senate, which was built sort of like the House of Lords. Humphrey proved to be a wild reformer in office, pushing through pro-unionization members, new government programs, ect. Humphrey proved to be the gold age of socialism in America. He surprised everyone by winning by a wide margin in 1972, even as a few of his foreign policy positions proved unpopular. Humphrey started to stale with voters in 1978 though, as the world economy was beginning to face dire straits, and Humphrey abandoned the chance to run for a third term.

He was said to be invincible, the fortune-crowned president from Massachusetts, who had saved the world from nuclear war, survived an assassin's bullet in Dallas, and wrested victory from the jaws of defeat in 1964 when all but the light-hearted dreamers prophesied his defeat at the hands of Nelson Rockefeller. Yet when news of his frequent extra-marital affairs rose to public attention in the spring of 1966, at the very moment when the war in Vietnam took a turn for the worse, John Fitzgerald Kennedy became a political third rail. Resisting calls to remove the president from office, Congressional Democrats instead turned to Lyndon Baines Johnson to save the party from ignominy. One-time vice president under Kennedy, Johnson had simmered under Kennedy's neglect and in chose in '64 to forgo a second term as second fiddle to Kennedy's Mozart and returned to Congress, where he began quietly pushing legislation that would render the president a ceremonial head-of-state and establish the Speaker of the House as a de facto prime minister, with the term of the lower house extended to four years. The so-called Johnson Amendment was adopted in 1966 and enacted the following year, inaugurating (in all but name) and American parliamentary democracy.